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Insights into Imaging
Fig. 9 | Insights into Imaging

Fig. 9

From: Thoracic abnormal air collections in patients in the intensive care unit: radiograph findings correlated with CT

Fig. 9

The major fissure mimicking pneumothorax on a radiograph in a 71-year-old man. He underwent partial resection of the right S6 for lung metastasis of esophageal cancer. a The major fissure appears as a thick linear opacity (black arrows) in the right lung field on a supine radiograph. It resembles the visceral pleura in pneumothorax. Unlike pneumothorax, vascular markings (black arrowhead) are visible outside of the thickened fissure. b An axial CT image shows the major fissure extending in the anteroposterior direction with a slight oblique angle (black arrows). Some volume loss in the right lower lobe caused the fissure to be displaced posteriorly; therefore, it seems to be visible on the anteroposterior radiograph

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